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Nov 5, 2021
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polish doc of paddle.optimizer.lr.PiecewiseDecay #4040

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6 changes: 3 additions & 3 deletions docs/api/paddle/optimizer/lr/PiecewiseDecay_cn.rst
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Expand Up @@ -6,14 +6,14 @@ PiecewiseDecay
.. py:class:: paddle.optimizer.lr.PiecewiseDecay(boundaries, values, last_epoch=-1, verbose=False)


该接口提供分段设置学习率的策略。
该接口提供分段设置学习率的策略。`boundaries` 表示学习率变化的边界步数，对应epoch的值，`values` 表示学习率变化的值。

过程可以描述如下：

.. code-block:: text

boundaries = [100, 200]
values = [1.0, 0.5, 0.1]
boundaries = [100, 200] # epoch仅代表当前步数，无实义
values = [1.0, 0.5, 0.1] # 在第[0,100), [100,200), [200,+∞)分别对应value中学习率的值

learning_rate = 1.0 if epoch < 100
learning_rate = 0.5 if 100 <= epoch < 200
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